RE: TKPROF output
- From: "Taylor, Chris David" <ChrisDavid.Taylor@xxxxxxxxxxxxxxx>
- To: "'lyallbarbour@xxxxxxxxxxxxxxx'" <lyallbarbour@xxxxxxxxxxxxxxx>, "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 30 Mar 2011 14:11:15 -0500
Have you tried running the SQL directly on the server itself?
Tom Kyte has several posts on this I think
Google:
site:asktom.oracle.com + +SQL*Net message from client +fetch
Here's some of his summaries to have something to think about:
This could be indicative of a client application inefficiently processing data
- if you think the client should be
a) getting data
b) doing something very fast
c) getting more data and repeat
this would indicate the client is not achieving B
So, I would say the report is getting hung up doing something, perhaps it was
starved for cpu, perhaps it get stuck writing to disk.
sqlnet message from client - we are waiting to be told what to do next in the
database. we are not currently doing anything in the database.
&&
set arraysize larger, that'll cut down on the round trips - if the problem is
that remote is on a high bandwidth - high latency network (like a satellite
connection), then this will help.
Chris Taylor
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
Office: 615-517-3355
Cell: 615-663-1673
Email: chris.taylor@xxxxxxxxxxxxxxx<mailto:chris.taylor@xxxxxxxxxxxxxxx>
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From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of lyallbarbour@xxxxxxxxxxxxxxx
Sent: Wednesday, March 30, 2011 1:55 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: TKPROF output
Trying to understand Fetch in a TKPROF output. We have an application on
Oracle Apps Server 10.1 Database 10.2.0.4 On production, a specific query
runs in about 3 seconds. On this new database server we created, it runs about
30 secs. Looks like the query does the same thing in the database, but we have
a ton of SQL*Net message waits on the query below. What are Fetches? What are
reasons why waits for SQL*Net messaging happens that relate to Fetches? See
below...
Here it is:
SELECT ROWID,SCRAP_ID,TX_ID,SHIFT_ID,ON_TX_ID,SCRAP_COMP_CODE,WEIGHT_UOM,
DEPT_CODE,INV_COMP_CODE,INV_ITEM_CODE,SCRAP_CODE,TYPE,CUST_NUM,PART,
QUANTITY,LENGTH,SCRAP_WEIGHT,TX_START_DT,RESPONSIBILITY_CODE,DEFECT_CODE,
NOTES
FROM
ST_PRODTX_SCRAP WHERE (WEIGHT_UOM=:1)
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 27457 0.91 0.90 0 29757 0 164741
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 27459 0.91 0.90 0 29757 0 164741
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: 677 (LBARBOUR)
Rows Row Source Operation
------- ---------------------------------------------------
164741 TABLE ACCESS FULL ST_PRODTX_SCRAP (cr=29757 pr=0 pw=0 time=165118 us)
Rows Execution Plan
------- ---------------------------------------------------
0 SELECT STATEMENT MODE: ALL_ROWS
164741 TABLE ACCESS MODE: ANALYZED (FULL) OF 'ST_PRODTX_SCRAP' (TABLE)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 27457 0.00 0.01
SQL*Net message from client 27457 1.07 100.33
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